Dismiss Notice

Welcome To CK5!

Registering is free and easy! Hope to see you on the forums soon.

Score a FREE t-shirt and membership sticker when you sign up for a Premium Membership and choose the recurring plan.

help: diff fluid change

Discussion in 'The Garage' started by blazerpro79, Mar 26, 2005.

  1. blazerpro79

    blazerpro79 1/2 ton status

    Joined:
    Jan 4, 2005
    Posts:
    528
    Likes Received:
    0
    Location:
    Simi Valley, CA
    hey guys im going to paint my diff cover, and need help changing my differential fluid. i have a few questions...

    how do i know when it is full? and what grade you guys suggest for new gear oil? thanks a lot.
     
  2. 85mudblazin

    85mudblazin 1/2 ton status

    Joined:
    Mar 26, 2004
    Posts:
    3,951
    Likes Received:
    0
    Location:
    Austin,TX
    your going to paint your diff cover??
    well if you just want to change the fluid for the hell of it just fill it up till it comes out of the fill hole.
    I use 80/90
     
  3. blazerpro79

    blazerpro79 1/2 ton status

    Joined:
    Jan 4, 2005
    Posts:
    528
    Likes Received:
    0
    Location:
    Simi Valley, CA
    ya i want to take it off to paint it... my truck is more of a street cruiser. ill post pics tomorrow
     
  4. Hossbaby50

    Hossbaby50 3/4 ton status

    Joined:
    Sep 1, 2001
    Posts:
    8,972
    Likes Received:
    0
    Location:
    Peoria, AZ
    Just fill the diff till it comes out the fill hole. Should be 3-4 quarts normally. If it gets hot where you are in California then I would run 85W-140 gear oil. It will take the heat better then 80W-90 will.

    Harley
     
  5. blazerpro79

    blazerpro79 1/2 ton status

    Joined:
    Jan 4, 2005
    Posts:
    528
    Likes Received:
    0
    Location:
    Simi Valley, CA
    do i need limited slip diff fluid or anything special? im doing the front and back.
     
  6. Big Red

    Big Red 1/2 ton status

    Joined:
    Jan 9, 2003
    Posts:
    250
    Likes Received:
    0
    Location:
    Bristol, CT
    if u have a L/S, then yes, u'll need to add an additive to it. Advance sells it for like $5. I used it all the time till my tranny blew. lol.
     
  7. blazerpro79

    blazerpro79 1/2 ton status

    Joined:
    Jan 4, 2005
    Posts:
    528
    Likes Received:
    0
    Location:
    Simi Valley, CA
    i know if i have limited slip if:
    i jack it up and one wheel spins with the other? or is that posi?
     
  8. Hossbaby50

    Hossbaby50 3/4 ton status

    Joined:
    Sep 1, 2001
    Posts:
    8,972
    Likes Received:
    0
    Location:
    Peoria, AZ
    The front won't have a posi unless it is aftermarket so you don't need the additive for that. If the rear has the govlock you should probably add the modifier into the diff. I was always told to use the GM additive from the dealer. I think it was like $8 or something like that.

    Harley
     

Share This Page